A Geometric Framework for Stochastic Shape Analysis
A Geometric Framework for Stochastic Shape Analysis
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随机形状分析的几何框架
DOI:
10.1007/s10208-018-9394-z
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发表时间:
2018
影响因子:
3
通讯作者:
Arnaudon A
中科院分区:
文献类型:
--
作者:
Arnaudon A
We introduce a stochastic model of diffeomorphisms, whose action on a variety of data types descends to stochastic evolution of shapes, images and landmarks. The stochasticity is introduced in the vector field which transports the data in the large deformation diffeomorphic metric mapping framework for shape analysis and image registration. The stochasticity thereby models errors or uncertainties of the flow in following the prescribed deformation velocity. The approach is illustrated in the example of finite-dimensional landmark manifolds, whose stochastic evolution is studied both via the Fokker–Planck equation and by numerical simulations. We derive two approaches for inferring parameters of the stochastic model from landmark configurations observed at discrete time points. The first of the two approaches matches moments of the Fokker–Planck equation to sample moments of the data, while the second approach employs an expectation-maximization based algorithm using a Monte Carlo bridge sampling scheme to optimise the data likelihood. We derive and numerically test the ability of the two approaches to infer the spatial correlation length of the underlying noise.
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DOI:
10.1098/rspa.2010.0043
发表时间:
2007
期刊:
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
影响因子:
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DOI:
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期刊:
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DOI:
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发表时间:
2016
期刊:
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影响因子:
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作者:
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DOI:
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发表时间:
2015
期刊:
Information processing in medical imaging : proceedings of the ... conference
影响因子:
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作者:
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通讯作者:
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